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Finding the Fourth Proportional to 311,990.01, 468,043.34 and 125,016.09

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Solution

The fourth proportional to 311,990.01, 468,043.34 and 125,016.09 is: 187,547.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,990.01 : 468,043.34 = 125,016.09 : x
  2. Step 2: Convert to fraction form
    311,990.01/468,043.34 = 125,016.09/x
  3. Step 3: Cross multiply
    311,990.01x = 468,043.34 × 125,016.09
  4. Step 4: Simplify right side
    311,990.01x = 58,512,948,317.34
  5. Step 5: Solve for x
    x = 58,512,948,317.34/311,990.01
  6. Step 6: Final answer
    x = 187,547.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.